Dissertation / PhD Thesis FZJ-2014-04903

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Submolecular imaging with single particleatomic force sensors



2014
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich
ISBN: 978-3-89336-976-8

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Schriften des Forschungszentrums Jülich. Reihe Schlüsseltechnologien / Key Technologies 87, 140 S. () = RWTH Aachen, Diss., 2014

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Abstract: Scanning probe methods with decorated tips is a new trend in surface study. An application of complex probe like a tip with an attached single molecule or single atom allows to get new details about the surface properties. It has been shown that the scanning tunnelling hydrogen microscopy(STHM) approach can reach atomic scale resolution and reveals intermolecular interactions. Because of the complexity, this new rapidly developing areais not yet fully understood. In this work systematic studies of tips decorated with Xe, H$_{2}$, D$_{2}$, CO, CH$_{4}$ was carried out. The tip with a single atom or a single molecule creates asingle particle sensor that simultaneously performs the function of an atomic-scale force sensor and a signal transducer, which couples the short-range force acting on the tip to the tunnelling conductance of the junction. In some cases the sensor-transducer function of the decorated STM tips can be quantitatively calibrated. Differences in the performance of the studied sensors suggest that the sensor functionality can be modified by tuning the interaction between the sensor particle and the STM tip. Based on force-field calculations, theoretical analysis of the single particle sensor shows an interrelation between the relative movement of the particle on the tip and contrast structure of the surface images.

Keyword(s): Dissertation


Note: RWTH Aachen, Diss., 2014

Contributing Institute(s):
  1. Funktionale Nanostrukturen an Oberflächen (PGI-3)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

Appears in the scientific report 2014
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 Record created 2014-09-11, last modified 2021-03-08


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